The manufacturer will base the trucks on those currently produced by its Hino Motors unit, a leading maker of commercial vehicles.

Seven-Eleven has 20,000 convenience stores in Japan, serving them with 5,800 trucks. Currently, lower-emission vehicles comprise 15% of the fleet, but the retailer is looking to raise that to 20% by 2020.

Toyota launched the Mirai mass-produced fuel-cell vehicle in 2014 and this year started shipments of fuel-cell buses in the Tokyo region. Earlier in 2017, it unveiled its Project Portal, 18-wheel prototype truck powered by two fuel cells from the Mirai. The vehicle has a range of 200 miles on a full tank of hydrogen.